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1971 R75/5 Partial Restoration
- schrader7032
- Posts: 9040
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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Re: 1971 R75/5 Partial Restoration
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
- srankin
- Posts: 1080
- Joined: Fri Jul 14, 2017 8:45 pm
- Location: Spencerport, NY USA
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Re: 1971 R75/5 Partial Restoration
As I have said, since I installed my first ride off stand on my RT, I have not had the bike fall over, or dig into the ground. I rarely use the stock side stand.
I did learn however on my 78RS, the center stand mounting points on the frame are weaker than the the 84RT. I have had one issue with the ride off stand on the 78 where they were bent and the stand didn't work properly. For now, I don't ride off with my weight on the bike, just rock off the stand. St.
Re: 1971 R75/5 Partial Restoration
Re: 1971 R75/5 Partial Restoration
Suggestions ????????
- srankin
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Re: 1971 R75/5 Partial Restoration
As for your cracking problem, wow! I can see the PO, hammered on the system instead of fixing it and now, you have the problem.
Correcting the seat latch mechanism and the seat peg so they work the way should will prevent further damage but, what to do with this break? Are you sure it is a real crack or perhaps just a flaw in the powder coat?
Can you tell if there is any movement of the plate? If not, you may get by with doing nothing now you have things properly adjusted. Time will tell if things need to be further worked on as in if the crack gets wider or longer.
Other than stripping the powder coat and welding, I see no other fix at this time. I myself would let it go and see if it gets bigger or worse in time. I know it is a disappointment to find this now after paying to powder coat. At least, it is where it can't be seen. If it gets worse or it really is a crack, as I said, you now have the seat fixed so the strain is off it that caused the break in the first place. St.
Re: 1971 R75/5 Partial Restoration
With the broken seat pin and now the frame ..... its obvious that area of the bike was used and abused. Im sure most of it was caused because of the mechanical latch itself no working properly. These old BMW's are tough but they still need to be treated with care. Understanding "how" everything works is a plus.
With light touch the crack does not move. Im afraid to pull hard on it but something needs to be done down the road. The owner of the bike said he can weld. Maybe he has a suggestion.
- srankin
- Posts: 1080
- Joined: Fri Jul 14, 2017 8:45 pm
- Location: Spencerport, NY USA
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Re: 1971 R75/5 Partial Restoration
I would strip off the powder coating in the area of the crack. This will give you a better idea of the damage and if in fact it needs to be welded. Welding will require more of the powder coat to be removed than just the bit around the crack. I hate to see you do a lot of work to find a minor problem.
If the crack is a real problem, then it can. be addressed as needed. If you strip the bit around it and it is not a problem, a bit of black paint can be blended in with care.
LOL, if the Previous owner did the damage to the bike, he would be the last person I would let weld it. A bit of care in the first place and the problem would not exist. In other words, I find people who cannot maintain things in a proper manner are not the kind of people I want to do work for me. Good luck. St.
Re: 1971 R75/5 Partial Restoration
Anyway, yesterday I finally got the handlebar controls from the powdercoater. Much better. So today I installed the controls and began attaching the throttle, brake and clutch cables. With the wires from the controls I was able to continue with the wiring in the headlight. One wire at a time. Ill post the wiring diagram Im working with.
I also printed and used the front wheel brake "cheat sheet". It makes setting up and adjusting the brakes much easier.
Re: 1971 R75/5 Partial Restoration
The front brake is set and adjusted.
- srankin
- Posts: 1080
- Joined: Fri Jul 14, 2017 8:45 pm
- Location: Spencerport, NY USA
- Been thanked: 19 times
Re: 1971 R75/5 Partial Restoration
The progress on my bike has stalled due to other things interfering. St.